Russia failed to share data on Boston suspect, review says

Two years before the Boston Marathon bombings, Russia declined to give the FBI information that most likely would have prompted deeper scrutiny of suspect Tamerlan Tsarnaev, an inspector general’s review said.

“They found that the Russians did not provide all the information that they had on him back then, and based on everything that was available the F.B.I. did all that it could,” said a senior American official briefed on the review.